Optical properties of a shear-deformed thermotropic cellulose derivative

The band texture of a thermotropic cellulose derivative, trifluoroacetoxypropylcellulose, was studied by optical microscopy. The texture consists of parallel, long, thin, black lines when viewed between crossed polarizers with one polarizer parallel to the shear direction. These lines are perpendicu...

Full description

Saved in:
Bibliographic Details
Published in:Journal of polymer science. Part B, Polymer physics Polymer physics, 1987-05, Vol.25 (5), p.1089-1098
Main Authors: Navard, P., Zachariades, A. E.
Format: Article
Language:English
Subjects:
Applied sciences
Cellulose and derivatives
Exact sciences and technology
Natural polymers
Physicochemistry of polymers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The band texture of a thermotropic cellulose derivative, trifluoroacetoxypropylcellulose, was studied by optical microscopy. The texture consists of parallel, long, thin, black lines when viewed between crossed polarizers with one polarizer parallel to the shear direction. These lines are perpendicular to the shear direction. Their optical properties indicate that the molecules are cooperatively oriented and this orientation director alternates from 0° to ±45° from the shear direction, with most of them at ±45°. This band phenomenon is identical to that observed with thermotropic nematic copolyesters.
ISSN:0887-6266
1099-0488
DOI:10.1002/polb.1987.090250510